title: Commentary: Sinners, preachers and natural experiments.
authors.affiliation: Department of Social & Environmental Health Research, Faculty of Public Health & Policy, LSHTM, 15-17 Tavistock Place, London WC1H 9SH, UK. mark.petticrew@lshtm.ac.uk.
authors.forename: Mark
authors.initials: M
authors.lastname: Petticrew
mesh_terms: D000434:Alcoholic Beverages; D015340:Epidemiologic Research Design; D011640:Public Policy / Q000331:legislation & jurisprudence*